So you say your goal is to build a portfolio of buy and hold rental properties. Be honest with yourself here, will your current apartment be cash flow positive and give you a CoC return in which you are okay with? If the answer is no, then option #2 is probably out of the question. If yes, then maybe consider in conjunction with another option.
You also say that your payment is a cash drain.. I assume that means you feel like it's expensive and you can live cheaper than you currently do. If yes, then option #3 would make sense. If you were to buy a small MFH and house hack, you'd be able to reduce your living expenses and that's definitely a win! It will allow you to ramp up your savings and move to the next investment.
Option #1 could work but if your current payment is a cash drain, how will you save for your next investment? Also, if you go multifamily and don't OO you'll most likely have to put down 25%. I have heard that 25% down on MFH is pretty standard nowadays.
At the end of the day, you have to determine what will be the best for you and your goals. Hopefully you find this somewhat helpful though!